dear Grace
all i know about Swaczy surname is that the spelling you write match with the pronounce in Ucrainian of Swaczy they probably change the spelling to continue the same pronunce. Also i know that this surname came from the north of Ukraina.
All i know about my grandfather's ancestor is that his father's name was john and he was a stableman of a titled family in poland where he meet my great-grandmother whose name was Anastasia.
feel fre to write me also to my e-mail that is
bloodymelly@libero.itsincerly yours Melika